File a hash with StopNCII.org for cross platform prevention (Promptchan content on Mastodon)

Why this matters for Promptchan content on Mastodon

• Public gallery distribution means Promptchan content reaches search engine indexes within days of generation. Search engine deindexing is essential alongside source removal.
• Federated content spreads across multiple instances through reposts and replies. Removing from the originating instance does not remove from the cached copies on every instance that federated the post.
• Promptchan content distributed through Mastodon typically reaches between four and twelve additional platforms within 72 hours through reposts, mirrors, and cross platform redistribution.
• Source attribution to Promptchan is critical for file Stop NCII hash because it establishes the AI generated nature of the content, which strengthens statutory claims under 47 USC 223a regardless of whether the depicted person ever existed in unaltered form.

How AI generator removal works

What to do, step by step

1. 01
   Preserve evidence before any other action Capture full page screenshots with the URL bar visible, save the highest resolution copy of the content available, and document the Promptchan fingerprint indicators including promptchan outputs display the generation prompt and seed in metadata when downloaded directly from the platform, which provides definitive identification of the source service. Local copy of the original content or a high quality copy retrieved before removal
2. 02
   Run a biometric scan to find every copy across platforms Promptchan content distributed on Mastodon rarely stays there. ScanErase indexes 2.4 billion face embeddings across 200 plus platforms and identifies every current hosting location in a single scan, including additional Promptchan variations.
3. 03
   Submit the perceptual hash to StopNCII.org Generate the perceptual hash on your own device using the StopNCII.org tool. Submit only the hash, not the image itself. The hash will be propagated to Mastodon and other StopNCII.org partner platforms within 48 hours.
4. 04
   Document the Promptchan source attribution Promptchan outputs display the generation prompt and seed in metadata when downloaded directly from the platform, which provides definitive identification of the source service. This attribution evidence is critical for the legal record and supports stronger statutory claims regardless of which specific action you pursue.
5. 05
   Coordinate with Mastodon platform removal Mastodon is federated across thousands of independent instances. Removal requires identifying the specific instance hosting the content and contacting that instance's admin directly.
6. 06
   File the complete evidence record for the legal track StopNCII.org operates under the legal framework of the Revenge Porn Helpline (UK) provides the foundational legal basis for this action. Document every notice sent, every platform response, and every confirmation in a single evidence file. ScanErase produces this Verified Removal Package automatically as your case progresses.

Legal context

• StopNCII.org operates under the legal framework of the Revenge Porn Helpline (UK)
• Participating platforms enforce hash matches under their own terms of service
• Most Mastodon instance admins comply quickly with NCII reports. The Mastodon Server Covenant explicitly prohibits NCII content, which gives leverage even with instances outside US jurisdiction.
• Promptchan attribution: Public gallery visibility means Promptchan content is highly findable and supports both DMCA copyright claims (where the source photograph is owned by the victim) and 47 USC 223a removal.